Eliminate readFloatRegFlat and setFloatRegFlat for the Fast Model ThreadContext since ARM doesn't use those register types, and those methods are no longer required by the ThreadContext interface. Change-Id: Ic149c64e2fbf1d313066fefe480c435eef6d66e5 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/49113 Maintainer: Gabe Black <gabe.black@gmail.com> Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com> Tested-by: kokoro <noreply+kokoro@google.com>